A copper rod 3 mm in diameter when subjected to a pull of 495 N extends by 0.07 mm over a gauge length of 100 mm. The youngs modulus for copper will be

A

$$1 \times 10^5 N/mm^2$$

B

$$1 \times 10^6 N/mm^2$$

C

$$7 \times 10^5 N/mm^2$$

D

$$1 \times 10^7 N/mm^2$$